have light fixtures. The original entrance at the Edward Holbrook House was removed when Cartier moved into the building in the 1920s. The current entrance was installed in a 2000 renovation. The third and fourth stories each contain three windows with molded surrounds. The third-story windows are topped by keystones, while a cornice with modillions, dentils, and brackets runs above the fourth story. The fifth story contains a mansard roof with a skylight and three stone dormers. Features As designed, the Plant House was supposed to have a large dining room, drawing room, and smoking annex on the ground floor, as well as a library and music room on the second floor, connected by a circular grand staircase. The east side of the second story had Plant's piano room, which contained a coffered ceiling. The west side of the second story had Pierre C. Cartier's private offices. After Cartier moved into the Plant House, it made some changes. The Cartier store occupied the first two stories of the Plant House while offices were placed on the upper floors. A second-story mezzanine, built in 1917 and demolished in 2001, had cabinet doors containing leather bindings on the edges. Following a 2016 renovation, the Cartier store was expanded to on five floors, with an interior stairway connecting all the stories. The first floor was designed as an imitation of a residential mansion. The restored interior had a lacquered panel in the foyer, with representations of panthers in gold leaf, as well as oak paneling on the walls. The second floor contained salesrooms for fine jewelry. The third floor was designed to sell watches while the fourth floor was designed to sell perfume. In addition, a terrace facing Fifth Avenue was installed. History In October 1899, the Roman Catholic Asylum sold much of the city block bounded clockwise from west by Fifth Avenue, 52nd Street, Madison Avenue, and 51st Street. The sale was valued at $2.5 million and included the lots on the east side of Fifth Avenue between 51st and 52nd Streets, as well as those on the side streets. George R. Sheldon and Charles T. Barney were reported as the purchasers. In the subsequent months, many of the lots along 51st and 52nd Streets were sold to families, though one lot was sold to the Union Club of the City of New York. The single-family lots were sold under the stipulation